Waleed Ur Rehaman

odernisierung unternehmenskritischer Middleware (.NET Core 3.1 → 6/8, Angular): +30% Effizienz. Architektur/Wartung von 25+ REST-Services (Oracle EBS, SFDA, Jira, Elevatus, Lean, Kyriba). API-Speed: 20m → <7s; Dashboards: 10m → <20s. Multi-Tenant SSO (JWT, OAuth2/OIDC, Key Rotation). Logging: Seq, Grafana, Loki. Führung, Clean Code, Test-Coverage 60% → 82%. Stack: .NET 8, C#, Azure, SQL, Redis, RabbitMQ.

Software Architect für J.P. Morgan Debtor Management System (Fintech/Accounting). Led Modernisierung: .NET Framework 4.7→.NET 6, improved maintainability & cloud readiness. Introduced Clean Architecture patterns, modularization, separation of concerns. Refactored performance-critical database queries, enhanced scalability. Onboarded team, technical leadership, resolved complex issues, maintained delivery quality. Tech: .NET 6, Kendo UI, Angular, MSSQL, Windows Services, Quartz.NET, Git

Principal Engineer auf Shopper Value—distributed Retail Analytics Platform. Improved architecture: backend service design, API refactoring, standardized integrations. Led migration to Azure AD & Azure Queue/Bus Services für asynchronous processing. Applied SonarQube: raised code quality, reduced technical debt. ~20% performance improvement in data flows through optimization. Tech: .NET Core 5, Angular, DevExtreme, Azure AD, Azure CI/CD, MSSQL

Senior Engineer auf NFS 2.0—global Finance & Lease Management System (China, India, Malaysia, Europe, UAE, USA). Microservices-style distributed application: Web Portal, APIs, Windows Services, WPF. Owned Credit Line module: Oracle DB compatibility for China region, local regulatory features. Owned Statement of Account: client engagement, complex bug fixes, improved stability. Tech: WPF, WCF, MSSQL, Oracle, SVN

Senior Engineer auf AirviewX—ERP for Telecom sector (Ticket Management, Project Management, Testing, BI, Business Process Automation). Refactored critical modules, optimized data access: ~15% reduction in page load/data load times. Led revamp of Ticket Management System: integrated DevExtreme, improved usability & performance. Contributed to Business Process Automation: automated workflows, improved operational efficiency. Tech: ASP.NET MVC5, Web API, ADO.NET, DevExtreme, JavaScript, MSSQL

Team Lead for IRetail POS—complete Point-of-Sale for SME retailers (stock, accounts,employee management). Led School Management System (School ERP): automated student/accounts/employee/paper generation/library for institutions. Responsible for requirement analysis, architectural design, task assignment, quality assurance. Managed team of 4, delivered modules under strict deadlines. Tech: ASP.NET MVC5, EF, JavaScript/jQuery, ChartJS, MSSQL

Developed Brand Order—B2B e-commerce integrated with QuickBooks & multiple payment gateways (PayPal, Stripe, Authorize.Net) for streamlined business ordering. Implemented Cart & Order Management integrated external systems using clean integration designs. Built Hospital & Lab Management System: patient medical histories, lab operations, basic inventory management handled full lifecycle from requirements to deployment. Tech: ASP.NET MVC5, JavaScript/jQuery, Azure Web Apps, ADO.NET, EF, MSSQL

Junior Engineer auf AgriThing—marketplace for agricultural machinery (classified platform enabling buyers/sellers to trade equipment online). Worked on user management,ad posting, database design. Built end-to-end features under senior supervision. Gained foundational experience in full-stack development, database design, and requirement implementation for e-commerce platforms. Tech: ASP.NET MVC4, JavaScript/jQuery, MSSQL, EF, Bootstrap

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